#define  _CRT_SECURE_NO_WARNINGS  1
#include <stdio.h>
int main()
{
	int a = 0;
	scanf("%d", &a);
	int n = a * a * a;
	int i = 1, k = 0;
	while (1)
	{
		int s = 0;
		int t = i;
		for (k = 0; k < a; k++)
		{
			s = s + i;
			i += 2;
		}
		if (s == n)
			break;
		else
			i = t + 2;
	}
	int b[1000] = { 0 };
	for (k = 0; k < a; k++)
	{
		i -= 2;
		b[k] = i;
	}
	for (k = a - 1; k >= 0; k--)
	{
		printf("%d", b[k]);
		if (k != 0)
			printf("+");
	}

	return 0;
}